Title: Ultrasound enhanced process for extracting metal species in supercritical fluids

Abstract

Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an extractant are disclosed. The disclosed embodiments specifically include enhancing the extraction or dissolution efficiency with ultrasound. The present methods allow the direct, efficient dissolution of UO₂ or other uranium oxides without generating any waste stream or by-products.

Inventors:

Wai, Chien M.; Enokida, Youichi

Issue Date:

Tue Oct 31 00:00:00 EST 2006

Research Org.:

Idaho Research Foundation, Inc., Moscow, ID (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1175962

Patent Number(s):

7128840

Application Number:

10/397,862

Assignee:

Idaho Research Foundation, Inc. (Moscow, ID)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D11/0203 - {with a supercritical fluid}
B01D11/0219 - {Fixed bed of solid material}
B01D11/0261 - {comprising vibrating mechanisms, e.g. mechanical, acoustical}
B01D11/0265 - {Applying ultrasound}
B01D11/028 - {Flow sheets}

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS

C22B60/0239 - {nitric acid containing ion as active agent}

G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS

G21C19/48 - Non-aqueous processes

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT

G21F9/06 - Processing
G21F9/30 - Processing

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E30/30 - Nuclear fission reactors

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

Y02P10/20 - Process efficiency

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

Y02W30/50 - Reuse, recycling or recovery technologies

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S210/912 - Heavy metal

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DOE Contract Number:  

FG07-98ER14913

Resource Type:

Patent

Resource Relation:

Patent File Date: 2003 Mar 25

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY